Here is a great recipe for a Thai Peanut sauce that I got from the MakeBistro YouTube channel. This is the same guy that was on the show Make Green Channel from my other Thai recipes.
Ingredients:

1-2 tbs of Palm sugar
2 Cloves garlic
Mound of dry roasted unsalted peanuts
2 (White/green end of scallons)  or Cilantro Stalks
1 tbs and a bit extra Soy sauce
1 teaspoon fish sauce
1/2 tbs sarachia sauce
1 Tbs + 1 teaspoon Tamarind
1/2 a lime (Maybe Whole Lime)
1-2 Tbs water

Directions:

Put the Palm sugar and garlic cloves in food processor and blend

Add peanuts and blend

Add soy, fish, lime and sarachia and water and blend

Done!